JAVA:ÓöàÏß³ÌʵÏÖʱ¼äµÄ¶¯Ì¬ÏÔʾ

import java.awt.*;
import javax.swing.*;
import java.util.Date;
import java.awt.*;
class Time extends JFrame implements Runnable{//ʵÏÖ½Ó¿Ú
Thread clockThread;
   JLabel jLabel=new JLabel();
   public Time()
   {
   Container con=this.getContentPane();
   con.add(new Drawtime());
   }
public void start(){
//¸Ã·½·¨ÊÇÀàµÄ·½·¨£¬²»ÊÇÏ̵߳ķ½·¨
if(clockThread==null){
   clockThread=new Thread(this,"Clock");
   /*Ïß³ÌÌåÊÇClock¶ÔÏó±¾Éí£¬Ïß³ÌÃû×ÖΪ"Clock"*/
   clockThread.start();//Æô¶¯Ïß³Ì
}
}
public void run(){//run()·½·¨ÖÐÊÇÏß³ÌÖ´ÐеÄÄÚÈÝ
    while(clockThread!=null){
    repaint();//Ë¢ÐÂÏÔʾ»­Ãæ
    try{
       clockThread.sleep(1000);
       //˯Ãß1Ã룬¼´Ã¿¸ô1ÃëÖ´ÐÐÒ»´Î
    }
    catch(InterruptedException e){}
    }
}
public void stop(){
//¸Ã·½·¨ÊÇÀàµÄ·½·¨£¬²»ÊÇÏ̵߳ķ½·¨
clockThread.stop();
clockThread=null;
}
}
public class JFrameDemo
{public static void main(String[] args)
{Time frame=new Time();
frame.setSize(500,300);
frame.setVisible(true);                   //ÉèÖÃ×é¼þ¿É¼û  
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); //¹Ø±ÕÈÝ¿Ú£¬²¢½áÊø³ÌÐòµÄÔËÐÐ
frame.start();
frame.run();
frame.stop();
}
}
class Drawtime extends JPanel
{
public void paint(Graphics g){
   g.setColor(Color.red);
   Font font1=new Font("»ªÎIJÊÔÆ",Font.ITALIC,60);
   g.setFont(font1);
Date now=new Date();//»ñµÃµ±Ç°µÄʱ¼ä¶ÔÏó
g.drawString(now.getHours()+":"+now.getMinutes()+":"+now.getSeconds(),140,140);
//ÏÔʾµ±Ç°Ê±¼ä
}
}